Important work from @TWenseleers (whom you ought to be following).

The Indian variant (B.1.617.2) may be 60% more transmissible than the UK variant (B.1.1.7), and 2.6 times more transmissible than the original strain. https://twitter.com/twenseleers/status/1391668815566721026

If these estimates are correct, this would mean the Indian variant (B.1.617.2) is the most transmissible variant yet identified.

For context, the Brazilian variant (P.1) is estimated to be between 1.7-2.4 times more transmissible than the original strain. https://science.sciencemag.org/content/early/2021/04/13/science.abh2644

This suggests strong efforts should be made to contain the B.1.617.2 variant and/or prevent its introduction into regions where it is not yet present.

We already know how to do this:
Border controls
Test, trace, isolate
Wear masks and ventilate
Get vaccinated if able